DynaSil™ uniquely allows traditional halogen and non-halogen flame retardants to work more effectively. A slight addition of DynaSil™ allows for reduction in heat release rate, a decrease in smoke generation, elimination or minimization of traditional hazardous flame retarding chemistries, improvements in processing and greater elongation of highly loaded compounds. Using DynaSil™ in your formulation will allow for more creative solutions in flame retardant applications.
Several studies have been conducted which prove the validity of replacing Antimony Trioxide with DynaSil across a broad spectrum of resins, from PVC to Polyolefin, to engineering grade polymers such as Polyamides. With DynaSil you can replace antimony trioxide in many high performance flame retardant formulations while maintaining the highest level of flame retardant performance. DynaSil is a completely inert polymer technology with the security of both supply and price stability.
Using a standard PVC plenum formulation DynaSil™ was evaluated as a total replacement of Antimony and compared looking at LOI and Physical properties. DynaSil is a 50% active concentrate. Adding 3% DynaSil as a one-to-one replacement of antimony, all flame retardant properties and mechanical properties are maintained.
Replacing Antimony in PVC
* 100% replacement of Antimony on active basis
DynaSil Technology Offers:
- Cost effective option for Antimony Replacement
- Improved overall fire performance
- Reduced heat release rate
- Lower smoke
- Better char formation
- Decrease flame retardant required
- Improve elongation
- Easy to handle
- No regulatory concerns
- Friendly ecotox profile
How DynaSIl™ Works
DynaSil offers a unique approach to flame retardancy. When the DynaSil burns, it forms a thin glass barrier that holds the halogen or active flame retardant in the matrix for maximum efficiency. As the fire is put out the material flows to the oxygen rich surface and rapidly crystalizes to form a robust char layer that will choke off the fuel source and prevent the polymer from reigniting. Even after Burning the DynaSil™ remains in the matrix and a second burn will cause the DynaSil to flow to the exposed area and reform a solid char prohibiting further burn.
Decrease Smoke Generation without the use of Metal salts or AOM
To demonstrate the additional benefits of DynaSil, AOM (ammonium octomolybdate) was removed from the Plenum formulation and was replaced with DynaSil. The control sample and the replacement sample were then sent to an outside lab for evaluation in a cone calorimeter. These results not only show that Dynasil successfully works as a replacement for AOM, it also provides for reduced peak heat release, reduced smoke parameters and improved Fire Performance Index.
Remove Antimony from Polyamide and Other Engineering Plastics
Dynasil effectively eliminates the need for antimony or reduces the amount of antimony required in most engineering plastics, while improving other properties. Evaluating DynaSil at varying loadings in polyamide 6,6 shows that Dynasil remains effective at half the active level of antimony.
Replacing Antimony in Polyamide 6,6
Using DynaSil to improve LSZH properties
Use DynaSil to improve LOI and balance mechanical properties. To demonstrate this improvement, we took a simple Low Smoke Zero Halogen formula filling polypropylene with 60% magnesium hydroxide and added 5% Dynasil. The result was a 38% improvement in LOI with only this small addition.
To evaluate the effect of DynaSil on mechanicals a 50% loaded system was evaluated various loadings of DynaSil to see the effect on tensile and elongation. The DynaSil did affect tensile strength negatively while increasing elongation to 94% with increasing loading level. The LOI was again improved with the low 5% loading of DynaSil.
DynaSil is a unique tool that can be used to formulate flame retardant compounds with properties that previously were not possible. Although the properties above show a drastic give and take of properties, this is a very simple system containing only resin, flame retardant and DynaSil. Utilizing DynaSil as tool in a formulated system the loss in tensile can be easily addressed, and the elongation can also be drastically increased. Our DynaChar compounds utilize the DynaSil technology to offer a system with LOI above 43, elongation above 150% and tensile strengths greater than 1750PSI.